<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
	#box{
		width: 100px;
		height: 200px;
		padding: 10px;
		background: blue;
		margin: 0 auto;
		
	}
</style>
</head>

<body>
<div id="box"></div>
</body>
</html>
